Machine



5 Sheets-Sheet 1.

(No Model.)

H. E. PAUK, Jr. SANDPAPERING MACHINE. No. 541,878. Patented July 2, 1895.

(No Model.) 5 Sheets-Sheet 3.

H. E. PAUK, Jr.

SANDPAPBRING MACHINE.

No. 541,878. Patented July 2, 1895.

.41 F 11 ii 7n J M n d 5 :a V ,g l Z1 5 e] A i y witneasea allure/to? V 'gra/udu' Hom a-Fefukjm s5 dsmm (Nb Model.) 5 sneak-sheen 4.

H. B. PAUK, Jr. SANDPAPBRING MACHINE.

No. 541,878. Patentd July 2, 1895.

III/III (45ml; vxm exmy.

65 (flax-n95 5 Sheets-Sheet 5.

L J L U A P H H SANDPAPERING MACHINE.

No. 541,878. Patented July 2; 1895.-

V UNITED STATES PATENT OFFICE.

HENRY ERNST PAUK, Ja, OF s'r. LOUIS, MISSOURI, ASSIGNOR TO THE HENRY PAUK & soNs MANUFACTURING COMPANY, OF SAME PLACE.

SANDPAPERING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 541,878, dated J'u1y'2, 1895.

Application filed October 8, 1894- Serial No. 525,240. (No model.)

To all whom it may concern:

Be it known that I, HENRY Eaus'r PAUK, J r., a citizen of the United States, and a resident of St. Louis, in the State of Missouri, have invented certain new and useful Improvements in Sandpapering-Machines, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming a part hereof.

This invention relates to improvements in that class of machinery known as sand papering machines, and has for its objects to enable moldings and other irregularsurfaces to be sandpapered, to readjust the sand paper in its holder when worn, without causing ridging or unevenness of the work which occurs when the paper is sectionally glued together, and to regulate the pressure on the work for insuring perfect smoothness of surface.

The invention consists in features of novelty hereinafter describedand claimed, refer-- sandpapering-machine. Fig. 2 is a plan thereof. Figs. 3 and 4 are opposite end views of the machine. Fig. 5 is a rear elevation thereof. Fig. 6 is a transverse section taken on line 6 6 in Fig. 5. Fig. 7 is a cross-section to enlarged scale of the sandpaper-holder as seen in Fig. 6, detached. Figs. 8, 9, 10, ll, 12, 14, and 15 are cross-sections to enlarged scale of the beds or bearing-rails for supporting and guiding various forms of moldings to be sandpapered, and Fig. 13 is a horizontal sectionthrough the sandpaper-holder, taken on line 13 13 in Fig. 7. Fig. 16 is a side elevation of the. sandpaper-holder to an enlarged scale, showing the pawl and ratchet wheel. Fig. 17 is an enlarged sectional view of the adjusting mechanism for the bead-plate.

Like letters and numerals of reference denote like parts in all the figures.

A. represents the framework of the machine having the table I). through which, parallel to its front edge is a gape extending the entire length of the table I). On the table I). and across the gap 0. is mounted a preferably rectangular frame d having a central opening (1 which is located immediately over the gap 0. The frame 01 is preferably'held in position on the table I) by four bolts or vertical guides c which are fixed at their lower ends by nutsf, or otherwise, to lugs g in the framework A, and project upward therefrom, passing freely through the frame d to a suitable distance above the latter, the free ends of the bolts e being provided with shoulders h and connected together by bracing i, as shown. Around the bolts a between the frame 01 and shoulders h, are spiral springs j, which normally tend to press the frame cl downward toward the table I). To the frame d, preferably at each side, are fixed depending rods in, which pass through guides Z fixed to the framework A, for guiding the frame d when raised from, or lowered to, the table b,-as hereinafter more particularly referred to.

On the framework A, preferably near one end thereof, and in rear of the gap 0, are standards A, which are arranged opposite to each other, transversely to the table 19, and carry bearings m through, and between which, is mounted the driving shaft n of the machine. To the front end of the shaft n, which projects beyond the front bearing m, is fixed a face plate 0 having a crank pin 10 which is connected by a rod or pitman gto the sand paper holder 1", the pitman q and holder r being lo catcd preferably in the central vertical plane of the gap 0. The holder r is composed (see particularly Figs. 7 and 13) of a preferably rectangular box or frame 8, having its ends 1. 1. projecting somewhat beyond the sides 2. 2. Across the front and rear projecting upright edges of the ends 1. l. are V-shaped grooves 15 which are adapted to slide along the correspondingly shaped edges 3. 3. of the opening d in the frame d. Within the frame .9 is placed a block u of cork, rubber, or like material which partly projects below the frame 8 and is shaped transversely on its under side to conform to the configuration of the molding or material tobe sand papered. The block it is held in longitudinal alignment with the pitman g by two plates 12 which are arranged vertically and adapted to slide transversely within the frame 8, one on each side of the block it, the latter being clamped bei s tters tween the sliding plates 0 by set screws to which work through the sides 2. 2 of the frame e and hear at their inner ends against the plates c. The plates 1; are preferably grooved at their ends and supported thereby within. the frame 3 on ledges 4. 4t, projecting from the insidesof theends 1. 1.

Above the block to, in parallel alignment therewith, is a roller :0, which is axially mounted in bearings y carried on the ends 1. 1, of the frame 8, the roller a: being operated by the handle 2' and provided with a ratchet wheel a which is engaged by the pawl a Around the roller 00 is wound a strip of sand paper Z), the free end of which passes downward through the opening in the frame 3 on the outside of one ofthe plates 7), and thence across the under sideof the block it, and upward through the opening in the frame 8 on the outside of the other plate v, the sand paper I) being held in this position by two plates 0 which are arranged parallel to the plates q) within the frames, externally to the sand paper 1), and clamp the latter against the plates 1) respectively, by meansof set screws cl which Work through the sides 2. 2. of the frame 3,

and hear at their inner ends against the plates 0. The plates 0 are supported within the frame 3 by the set screws to which pass freely through holes, 5. in the plates 0' as shown.

By the above arrangement, on slackening the plates 0 and partly unwinding the sand paper strip 1) from the overhead roller a: the

-worn portion of the sand paper I) where it crosses the under side of the block u can be continuously removed, and a fresh surface free from glued joints adjusted thereto, until the paper roll is exhausted.

Beneath the gap 0 in the table I) is atrough or channel e (which is preferably made of wood, or other material) removably fixed to, and extending the entire length of the table 1'). Along the bottom of the trough e is fixed a bed or hearing railf, having its upper face conformable in cross section to the con figu ration of the under side of the molding g, which is supported on, and caused to travel along, the bar or rail f by preferably double feed rollers h (one roller h at each end, or thereabout, of the machine) which are fixed on shafts 2" mounted transversely to the machine in suitable bearings, and rotated by any suitable mechanism. Each roller h projects through, and slightly above, the adjacent central portion of the bed or rail f, and is serrated transversely on its circumference, so that, on the rotation of the rollers h a firm hold is taken on the under side of the molding g and the positive movement of the latteralong the bed or railf thereby insured.

Bearing upon the upper side of the molding g, immediately over the feed rollers h, are idler rollers j which conform to the configuration of the molding g and are axially mounted in hearings in, which are vertically adjustable for maintaining a normal pressure of the guiding and maintaining the proper alignment of the molding g, as shown in Fig. 2.

For reciprocating the sand paper holder 0,

and rotating the feed rollers h, a pulley Z is preferably fixed on the driving shaft 01 and driven by belt from any suitable power. The pulley Z is provided with the loose pulley Z and belt shifter Z in the usual manner.

On the rear end of the shaft n is fixed the varying speed pulley m which is connected by the belt n with a corresponding pulley m fixed on the shaft 2" carrying one of the feed rollers h, and on the same shaft 1" is fixed a pulley 0, which connects by belt p with a corresponding pulley 0 fixed on the shaft 1" of the other feed roller h.

To the under side of the frame d, near each end thereof, are attached the forked ends of a depending bar g which is coupled at its lower end to the inner arm of a lever r pivoted to the framework A, the outer arms of the levers 0" being connected together by a treadle bar 8' in front of the machine, whereby on depressing the treadle s the frame d with the sand paper holder r and its appendages may be raised from the table 1) against the pressure of the springsj at pleasure. Vhen raised to its full extent, as indicated by dotted-lines in Figs. 1, 5, and 6, a lever 25' which is pivoted to the framework A swings by the superior gravity of its longer arm, beneath the frame 61 and thereby supports the latter in the raised position as long as desired; or the frame (Z may be raised and lowered by any other suitable arrangement of mechanism.

In operation, assuming the frame d and holder 0" with the sand paper 1) fixed therein, to be raised and supported as described, and the molding g properly adjusted along its bed or rail f, and between the rollers h',j', on releasingthe lever 25 and lowering the frame of to within a short distance from the table I), the sand paper I) bears upon the molding g and is thereby pressed into the depressed portions or corresponding configuration of the under side of the block u which tightens the sand paper 11' thereat, and causes it to bear thoroughly against every part of the molding g. Rotation being then given to the crank disk 0,19 so as to reciprocate the holder o by the pitman q the sand paper 6 is moved to and fro on the molding g. Simultaneously, by the rotation of the feed rollers h, the molding g is moved slowly along its bed or rail f toward the delivery end of the machine so as to continually present a fresh surface to the rubbing action of the sand paper Z) until the operation is completed.

For. starting and stopping the feed movement of the molding g at pleasure during the sand papering process, an idler roller u is lo cated over, and transversely to the driving belt n, the spindle or axis of the roller u being fixed part way along, and at right angles to, a vertically arranged arm or lever c which is hinged at its lower end to the framework A and provided at its upper, or free end with a handle 10, so that on throwingthe lever "12 over on it's fulcrum in one, direction the roller 11, bears by gravity upon the belt 'n, which is thereby tightened and rotates the feed rollers h for starting the molding g, and by throwing the lever o over in the opposite direction the roller u is removed from the belt at which becoming slaokened ceases to rotate the feed rollers h and thereby stops the movement of the molding 9'. For more perfectly adjusting the pressure of the sand paper 19 upon the molding g, a screw threaded boltx' bears at its upper end against the under side of the frame 01 (at each side thereof) and works through a worm wheel or out g which is held by, and between the jaws of a bifurcated bracket 2' fixed totheframeworkA. Theworm wheelsornuts y are engaged by worms g fixedon a shaft a which is mounted in suitable bearings carried by the framework A, the shaft a being rotated by a handle b or other suitable means, so that on rotating the worms g in either direction the bolts 0:, and with them the frame 01 and holder r, aregraduall-y raised or lowered, and the pressure of the sand paper 1) on the molding 9' increased or diminished accordingly at pleasure. This movement is independent of, and in nowise interferes with, the action of the treadle s.

This invention, which is particularly adapted for sand papering various descriptions of moldings, such as those shown in Figs. 9, 1O, 11, 14, and 15, is also applicable for flat work, the bearin g rails and sand paper block being adapted in each case to the configuration of the under, and upper sides, respectively,of the material to be operated on.

By this invention, owing to the continuity of the sand paper where it crosses the face of the molding, all glued joints in the sand paper and consequent unevenness or ridging on the surface of the work are avoided. Also by the reciprocating movement of the sand paper along the work in preference to a rotary movement thereon, combined with the means employed for regulating the pressure, the sand papering is more thoroughly and uniformly effected, and a perfectly smooth surface insuredv What I claim as my invention, and desire to secure by Letters Patent, is-

1. In a sand papering machine, a holder for the sand paper, comprising a box or frame, having two opposite inner plates held vertically by, and adapted to slide transversely within'the frame, means for moving the said plates against an interposed block of flexible material projecting partly below the frame,

jtwo outerly'plates intermediate, and parallel to, the inner plates and sides of the frame, respectively, and means for moving the outerly plates toward the inner plates, and against interposed portions of the sand paper, substantially as shown and described.

2. In a sand papering machine, a holder for the sand paper, comprising a box or frame having two opposite inner plates held vertically by, and adapted to slide transversely within the frame, means for moving the said plates against an interposed block of flexible material projecting partly below the frame, outerly plates, intermediate, and parallel to, the inner plates and sides of the frame, respectively, means for moving the outerly plates toward'the inner plates and against interposed portions of the sand paper, a roller axially mounted above the frame, and means forwinding and holdingthe sand paperaround the said roller, substantially as shown and described.

3. In a sand papering machine, the combination with the holder, and the bed supporting the material to be sand papered, ofa holder for the sand paper, composed of a box or frame carrying inner and outerly plates and means for moving the plates against an interposed block of flexible substance, and against interposed portions of the sand paper, respectively, the said holder being adapted to slide on a frame, and means for reciprocating the holder along the said frame, substantially as shown and described.

t. In a sandpapering machine, the combination with the table, and the bed supporting the material to be sandpapered, a vertically adjustable frame mounted upon said table, and provided with guides, springs bearing upon the frame, a holder for sand paper, composedof a box or frame carrying inner and outerly plates and means for moving the plates against an interposed block of flexible material and against interposed portions of the sand paper respectively, the said holder being adapted to slide on the said vertically adj nstable frame, and means for reciprocating the holder along the said frame, substantially as shown and described.

,5. In a sand papering machine, the combination with the framework, of a vertically adjustable frame provided with guides and adapted to carry the sand paper holder,

springs bearing upon the frame, means for raising the frame against the pressure of the springs, and pivoted levers adapted to swing beneath and support the'frame when raised, substantially as shown and described.

6. In a sand papering machine, the combination with the framework, and thejbed supporting the material to be sand papered, of a vertically adjustable frame, provided with guides and adapted to carrythe sand paper holder, screwed bolts bearing against the un- In testimony whereof I affix my signature der side of the frame and working through in the presence of two Witnesses. worm wheels or nuts held 1n. fixed brackets, HENRY ERNST PAUK, JR

the Wheels or nuts being engaged by worms 5 fixed on a shaft, and means for rotating the Witnesses:

said shaft, substantially as shown and de ALFRED A. EIOKS, scribed. GEORGE S. TOURVILLE. 

